🙁 The Wall feels for you. There could be many reasons why he is not teaching a course for undergrads this semester. Faculty have to balance research, publishing, teaching, and life all at the same time. This semester might just be especially busy in one of those areas for him. As to why their are so few math courses, our department is fairly small – nearly half the size of MITs (and that’s just full-time faculty, not even counting adjuncts and graduate students). BC is historically a humanities driven school, and some of the STEM subjects are still growing here.